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Old January 17, 2013, 08:11 PM   #7
Senior Member
Join Date: May 4, 2001
Posts: 6,913
In that case, the best option is to remove the entire front sight assembly and replace it with a gas block that has a rail for a flip up sight.

The only "trick" to mounting a new block once the original sight is off is making sure the block is centered over the gas port in the barrel, and making sure it's not canted to one side.

You should be able to re-use the gas tube with the new block.
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